78406808 has 16 divisors (see below), whose sum is σ = 147319560. Its totient is φ = 39121600.

The previous prime is 78406753. The next prime is 78406819. The reversal of 78406808 is 80860487.

It is a happy number.

It is a super-2 number, since 2×78406808² = 12295255081497728, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6053 + ... + 13908.

Almost surely, 2^78406808 is an apocalyptic number.

It is an amenable number.

78406808 is a deficient number, since it is larger than the sum of its proper divisors (68912752).

78406808 is a wasteful number, since it uses less digits than its factorization.

78406808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20458 (or 20454 counting only the distinct ones).

The product of its (nonzero) digits is 86016, while the sum is 41.

The square root of 78406808 is about 8854.7618827386. The cubic root of 78406808 is about 428.0073804300.

The spelling of 78406808 in words is "seventy-eight million, four hundred six thousand, eight hundred eight".